The third release candidate for WordPress 3.4 is now available. Since RC2, we’ve fixed a few lingering issues with the new live preview feature, as well as with custom headers and backgrounds.

There are no remaining issues, and we plan to release 3.4 in the coming days. But if you think you’ve found a bug, you can post to the Alpha/Beta area in the support forums, or file a bug report on WordPress Trac.